Share some cool historical details you’ve learned that just beg for inclusion in an RPG!

My contribution is the Man Engine, a sort-of mining elevator I learned about when I visited the Mining Museum in Clausthal-Zellerfeld in the Harz Mountains in Germany, where this contraption was invented.

Basically, early in the 19th century the mines in the Harz Mountains were the deepest in the world at the time, with the Samson Pit in Sankt Andreasberg reaching a depth of 800 meters. This meant that the miners had to spend one hour climbing down the mine until they reached their place of work - and two hours climbing up again, carrying their pit lamps in one hand the entire time.

And, unfortunately, this was considered unpaid commuting time, not paid work time - so three hours each day were gone climbing those damn ladders. It became so bad that some miners even asked if they could simply sleep down there - in the damp, humid air, at the permanent 8°C of the deep underground.

But then a foreman and a mechanic hit on an alternative. You see, all those mines needed massive pumps to keep the groundwater out of the mines (a detail that is curiously neglected in most portrayals of mine-themed fantasy dungeons). These pumps consisted of a series of parallel, oscillating wooden beams.

And the innovation was that they installed small wooden platforms on these beams. In this way, instead of climbing, the miners could simply step back and forth between the platforms, using their vertical oscillation to get up or down (they still needed to hold their pit lamps in one hand, though). And thus, the travel time was cut down to a mere 20 minutes in each direction - a saving of 2 hours 20 minutes each day!

Needless to say, I absolutely must use this technological marvel if the PCs explore some dwarven mining complex…

So, what cool historical tidbits do you know that would make for awesome #ttrpg fodder?